2221119978 has 64 divisors (see below), whose sum is σ = 5673507840. Its totient is φ = 562838400.

The previous prime is 2221119911. The next prime is 2221119991. The reversal of 2221119978 is 8799111222.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39688 + ... + 77571.

It is an arithmetic number, because the mean of its divisors is an integer number (88648560).

Almost surely, 2^2221119978 is an apocalyptic number.

2221119978 is an abundant number, since it is smaller than the sum of its proper divisors (3452387862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221119978 is a wasteful number, since it uses less digits than its factorization.

2221119978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117323.

The product of its digits is 36288, while the sum is 42.

The square root of 2221119978 is about 47128.7595635616. The cubic root of 2221119978 is about 1304.7400876953.

The spelling of 2221119978 in words is "two billion, two hundred twenty-one million, one hundred nineteen thousand, nine hundred seventy-eight".